CN212450708U

CN212450708U - High-efficient deamination nitrogen device

Info

Publication number: CN212450708U
Application number: CN202020396267.8U
Authority: CN
Inventors: 徐向英; 王明传; 王存金
Original assignee: SHANDONG CHANGYI PETROCHEMICAL CO Ltd
Current assignee: SHANDONG CHANGYI PETROCHEMICAL CO Ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2021-02-02
Anticipated expiration: 2030-03-25

Abstract

The utility model discloses a high-efficiency ammonia nitrogen removal device, which comprises a source water tank, wherein a source water lifting pump is communicated with the source water tank, a preheater is communicated with the source water lifting pump, a negative pressure ammonia removal tower is communicated with the output end of the preheater, a waste water outlet of the negative pressure ammonia removal tower is communicated with the preheater in a matching way, a gas phase outlet of the negative pressure ammonia removal tower is communicated with a condenser, a gas-liquid separation tank is communicated with the output end of the condenser, the gas-liquid separation tank is communicated with a backflow port of the negative pressure ammonia removal tower in a matching way, an ammonia extraction mixer is communicated with the ammonia gas outlet of the condenser, an ammonia recovery device is communicated with the ammonia recovery device, a sewage outlet of the ammonia recovery device is communicated with a cooler, an absorption circulating pump is arranged on a sewage outlet pipe, a cooling water output end, the water outlet pipe and the gas outlet of the ammonia recovery device are communicated with a tail gas purification tower. The utility model has the advantages that: improving the efficiency of deamination and nitrogen removal and reducing the cost.

Description

High-efficient deamination nitrogen device

Technical Field

The utility model relates to a sewage treatment plant specifically indicates a high-efficient deamination nitrogen device.

Background

According to the regulations of the emission standard of pollutants for petroleum refining industry (GB 31570-2015), the content of ammonia nitrogen in the waste water discharged by enterprises and enterprises needs to be reduced to 8mg/L, and the conventional flow of the waste water containing ammonia nitrogen is to convert the ammonia nitrogen in the waste water into nitrogen and then separate the nitrogen and the nitrogen after passing through a nitrification unit and a denitrification unit.

In addition to the biological method of the nitrification/denitrification principle to remove ammonia nitrogen in the wastewater, two main methods exist at present, namely, a method of adding a medicament into water, an oxidation method or a chemical precipitation method utilizing the redox principle and a method of adding a medicament into water are adopted, and secondary pollution is generated by adding new substances into the wastewater; secondly, a stripping method utilizing a gas-liquid phase equilibrium principle is characterized in that the volatility of ammonia is utilized, sodium hydroxide is added into wastewater, ammonia nitrogen in the wastewater is converted into a free state from a fixed state, then the ammonia nitrogen is separated by utilizing the gas-liquid phase equilibrium, air is used for blowing out the ammonia nitrogen, the stripping method firstly adjusts the pH of the wastewater to be more than or equal to 11, the existence form of more than 99% of the ammonia nitrogen in the wastewater is the free state under the condition, then the wastewater is heated to 60-80 ℃, the deamination effect is poor if the temperature is too low, finally air is used as a gas phase for stripping, but the heat can be continuously dissipated in the stripping process, the temperature needs to be compensated, then an acid solution is used for absorbing the ammonia-containing air to obtain an acid salt solution, and because a large amount of air exists in the process, high-concentration ammonia water (only can be recycled to; and the air stripping method can only reduce the ammonia nitrogen in water to below 50mg/L generally, and if the ammonia nitrogen is reduced to below 15mg/L, the operation cost is greatly increased.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an improve high-efficient deamination nitrogen device of deamination nitrogen efficiency, reduce cost.

In order to solve the technical problem, the utility model comprises a source water tank, the source water tank is provided with a source water lift pump through a pipeline I, the source water lift pump is provided with a preheater through a pipeline II, the pipeline II is sequentially provided with a check valve I, a valve I and a rotor flowmeter I in a matching way, the output end of the preheater is provided with a negative pressure deamination tower through a pipeline III in a communicating way, the waste water outlet of the negative pressure deamination tower is communicated with the preheater through a return pipe in a matching way, the return pipe is sequentially provided with a tower bottom water outlet pump, a check valve II, a valve II and a rotor flowmeter II in a matching way, the gas phase outlet of the negative pressure deamination tower is provided with a condenser through a pipeline VI in a communicating way, the condenser is provided with a cooling water inlet I and a cooling water outlet I in a matching way, the output end of the condenser is, the condenser ammonia outlet is provided with an ammonia extraction mixer through a pipeline four communication, the ammonia extraction mixer output end is provided with an ammonia recovery device through an output pipe communication, the ammonia recovery device effluent outlet is provided with a cooler through an effluent outlet pipe communication, the effluent outlet pipe is provided with an absorption circulating pump, the cooler is provided with a cooling water inlet II and a cooling water outlet II in a matching way, the cooling water output end of the cooler is communicated with the ammonia extraction mixer in a matching way, the ammonia water outlet of the ammonia recovery device is provided with an ammonia pump through a pipeline seven communication, the ammonia pump output end is provided with a water outlet pipe in a communicating way, the ammonia recovery device gas outlet is provided with a tail gas purification tower through a pipeline eight communication way, the tail gas outlet end of the tail gas purification tower is provided with an exhaust pipe in a communicating way, and the feed end of the tail gas purification tower is provided with a feed pipe in a communicating way, the circulating inlet and outlet ends of the tail gas purification tower are communicated with each other through a pipeline nine, and a purification circulating pump is arranged on the pipeline nine in a matched mode.

Furthermore, a check valve IV, a valve IV and a rotor flow meter IV are sequentially arranged on the water outlet pipe.

Furthermore, a drain pipe is communicated with the sewage discharge end of the preheater.

Furthermore, valves are arranged on the first pipeline, the third pipeline, the fourth pipeline, the sewage outlet pipe, the seventh pipeline and the ninth pipeline in a matching manner.

Further, the preheater is set as a heat exchanger, the negative pressure deamination tower is set as a stripping tower, the gas-liquid separation tank is set as a reflux tank, the ammonia pumping mixer is set as a water ejector, and the ammonia recovery device is set as an ammonia absorption tank.

Compared with the prior art, the utility model the advantage lie in: the utility model discloses a negative pressure steam stripping method, the waste water that can not advance sewage treatment plant with the part, strip through steam, negative pressure deamination tower top of the tower adopts water dart to take out the negative pressure, retrieve the ammonia nitrogen in the sewage and make the aqueous ammonia that content reaches 15%, then spout ammonia being used for flue gas denitrogenation, realize real clear environmental protection and handle, desulfurization waste water adopts steam negative pressure steam stripping method to remove ammonia, another advantage is that the basicity of waste water is 1.3%, the aquatic contains an amount of sodium bicarbonate, so, need not to add sodium hydroxide and adjust pH to 11, alright realization waste water deamination.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings:

fig. 1 is a schematic structural diagram of the present invention.

As shown in the figure: 1. a source water tank; 2. a first pipeline; 3. a source water lift pump; 4. a second pipeline; 5. a preheater; 6. a first check valve; 7. a first valve; 8. a first rotor flow meter; 9. a third pipeline; 10. a negative pressure deamination tower; 11. a water return pipe; 12. a drain pipe; 13. a water pump is discharged from the bottom of the tower; 14. a second check valve; 15. a second valve; 16. a rotor flow meter II; 17. a gas-liquid separation tank; 18. a sixth pipeline; 19. a condenser; 20. a cooling water inlet I; 21. a first cooling water outlet; 22. a fifth pipeline; 23. a reflux pump; 24. a third valve; 25. a check valve III; 26. a third rotor flow meter; 27. a fourth pipeline; 28. an ammonia extraction mixer; 29. an ammonia recovery unit; 30. a sewage outlet pipe; 31. a cooler; 32. an absorption circulation pump; 33. a second cooling water inlet; 34. a second cooling water outlet; 35. a seventh pipeline; 36. an ammonia pump; 37. a water outlet pipe; 38. a eighth pipeline; 39. a tail gas purification tower; 40. an exhaust pipe; 41. a feed pipe; 42. a ninth pipeline; 43. a purification circulating pump; 44. a check valve IV; 45. a fourth valve; 46. a rotor flow meter IV; 47. and (5) outputting the product.

Detailed Description

Referring to the attached drawing, this high-efficient deamination nitrogen device includes source water pitcher 1, and source water pitcher 1 is equipped with source water elevator pump 3 through pipeline 2 intercommunication, and source water elevator pump 3 is equipped with pre-heater 5 through two 4 intercommunications in the pipeline, and pre-heater 5 is the heat exchanger, and 5 blow-off ends of pre-heater intercommunication are equipped with drain pipe 12. A first check valve 6, a first valve 7 and a first rotameter 8 are sequentially arranged on the second pipeline 4 in a matched manner, the output end of the preheater 5 is communicated with a negative pressure deamination tower 10 through a third pipeline 9, the negative pressure deamination tower 10 is a stripping tower, the waste water outlet of the negative pressure deamination tower 10 is communicated with the preheater 5 through a return water pipe 11 in a matched manner, the return water pipe 11 is sequentially provided with a tower bottom water outlet pump 13, a second check valve 14, a second valve 15 and a second rotameter 16 in a matched manner, the gas phase outlet of the negative pressure deamination tower 10 is communicated with a condenser 19 through a sixth pipeline 18, the condenser 19 is provided with a first cooling water inlet 20 and a first cooling water outlet 21 in a matched manner, the output end of the condenser 19 is communicated with a gas-liquid separation tank 17, the gas-liquid separation tank 17 is a reflux tank, the gas-liquid separation tank 17 is communicated with, The ammonia outlet of the condenser 19 is communicated with an ammonia extraction mixer 28 through a pipeline four 27, the ammonia extraction mixer 28 is a water ejector, the output end of the ammonia extraction mixer 28 is communicated with an ammonia recovery device 29, the ammonia recovery device 29 is an ammonia absorption tank, a sewage outlet of the ammonia recovery device 29 is communicated with a cooler 31 through a sewage outlet pipe 30, an absorption circulating pump 32 is arranged on the sewage outlet pipe 30, the cooler 31 is provided with a cooling water inlet two 33 and a cooling water outlet two 34 in a matching manner, the cooling water output end of the cooler 31 is communicated with the ammonia extraction mixer 28 through an output pipe 47 in a matching manner, an ammonia water outlet of the ammonia recovery device 29 is communicated with an ammonia water pump 36 through a pipeline seven 35, the output end of the ammonia water pump 36 is communicated with an outlet pipe 37, and the outlet pipe 37 is sequentially provided with a check valve four 44, a valve four 45 and a rotameter four. The gas outlet of the ammonia recovery device 29 is communicated with a tail gas purification tower 39 through a pipeline eight 38, the tail gas outlet end of the tail gas purification tower 39 is communicated with an exhaust pipe 40, the feed end of the tail gas purification tower 39 is communicated with an inlet pipe 41, the circulating inlet and outlet ends of the tail gas purification tower 39 are communicated with each other through a pipeline nine 42, and a purification circulating pump 43 is arranged on the pipeline nine 42 in a matched manner. Valves are arranged on the first pipeline 2, the third pipeline 9, the fourth pipeline 27, the sewage outlet pipe 30, the seventh pipeline 35 and the ninth pipeline 42 in a matching manner.

The utility model discloses when the concrete implementation, the external pipeline of source water pitcher 1 and equipment are poured into the waste water that needs deamination nitrogen in waste water workshop, source water elevator pump 3 external power supply is started the back and is poured into pre-heater 5 with waste water and heat this moment, then waste water after the heating is in getting into negative pressure deammoniation tower 10, negative pressure air stripping separation carries out, waste water gets into negative pressure deammoniation tower 10 after preheating, negative pressure deammoniation tower 10 bottom inserts the steam stripping, after the waste water steam stripping, the ammonia gas is doping sulfur dioxide and is just distilling off from negative pressure deammoniation tower 10 overhead and getting into top of the tower gas-liquid separation jar 17 after condenser 19 condensation, the liquid phase of gas-liquid separation jar 17 returns to in pre-heater 5 through tower bottom play water pump 13, the gaseous phase of gas-liquid separation jar 17 follows gas-liquid separation jar 17 overhead and gets into in ammonia extraction mixer 28 behind condenser 19, then in ammonia extraction mixer 28 gets into ammonia recovery unit 29, absorbing ammonia gas and carbon dioxide into an ammonia recovery device 29, sending out ammonia liquid through an ammonia water pump 36 and a water outlet pipe 37 when the concentration of the ammonia liquid in the wastewater reaches a standard, pumping out gas, entering a tail gas purification tower 39 for purification, adding dilute acid into the tail gas purification tower 39 through a feed pipe 41, carrying out heat exchange between the dilute acid and the entering gas, increasing the temperature of the acid liquid, volatilizing a solvent, and then discharging the solution through an exhaust pipe 40; the second cooling water inlet 33 and the first cooling water inlet 20 are preferably externally connected with a unified water inlet pipeline through pipe fittings, and the second cooling water outlet 34 and the first cooling water outlet 21 are preferably externally connected with a unified water outlet pipeline through pipe fittings; the utility model optimally sets the relevant control program to control and operate through the PLC; the utility model provides a pipeline flow control also has the switch of the valve of commonly used, gate etc. and controls such as popular, and preferred valve is established to the ball valve.

The utility model discloses a negative pressure steam stripping method, the waste water that can not advance sewage treatment plant with the part, strip through steam, negative pressure deamination tower top of the tower adopts water dart to take out the negative pressure, retrieve the ammonia nitrogen in the sewage and make the aqueous ammonia that content reaches 15%, then spout ammonia being used for flue gas denitrogenation, realize real clear environmental protection and handle, desulfurization waste water adopts steam negative pressure steam stripping method to remove ammonia, another advantage is that the basicity of waste water is 1.3%, the aquatic contains an amount of sodium bicarbonate, so, need not to add sodium hydroxide and adjust pH to 11, alright realization waste water deamination.

The utility model discloses the relevant device of product is current common use product such as heat exchanger, gas stripping tower, reflux drum, water dart, ammonia absorption tank, condenser, is linked together concrete structure according to the effective connected mode and is not saying tiredly.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims

1. The utility model provides a high-efficient deamination nitrogen device, includes source water pitcher, its characterized in that: the source water tank is provided with a source water lifting pump through a first pipeline in a communicating mode, the source water lifting pump is provided with a preheater through a second pipeline in a communicating mode, the second pipeline is sequentially provided with a first check valve, a first valve and a first rotor flow meter in a matching mode, the output end of the preheater is provided with a negative pressure deamination tower through a third pipeline in a communicating mode, the waste water outlet of the negative pressure deamination tower is communicated with the preheater through a return water pipe, the return water pipe is sequentially provided with a tower bottom water outlet pump, a second check valve, a second valve and a second rotor flow meter in a matching mode, the gas phase outlet of the negative pressure deamination tower is provided with a condenser through a sixth pipeline in a communicating mode, the condenser is provided with a first cooling water inlet and a first cooling water outlet in a matching mode, the output end of the condenser is provided with a gas-liquid, A third valve, a third check valve and a third rotameter, wherein an ammonia gas outlet of the condenser is provided with an ammonia pumping mixer through a fourth pipeline communication, an output end of the ammonia pumping mixer is provided with an ammonia recovery device through an output pipe communication, a sewage outlet of the ammonia recovery device is provided with a cooler through a sewage outlet pipe communication, an absorption circulating pump is arranged on the sewage outlet pipe, the cooler is provided with a second cooling water inlet and a second cooling water outlet in a matching way, a cooling water output end of the cooler is communicated with the ammonia pumping mixer in a matching way, an ammonia water outlet of the ammonia recovery device is provided with an ammonia water pump through a seventh pipeline communication, an output end of the ammonia water pump is provided with a water outlet pipe in a communicating way, a gas outlet of the ammonia recovery device is provided with a tail gas purification tower through an eighth pipeline communication way, a tail gas outlet end of the tail gas purification tower is provided with an exhaust pipe in a communicating, and a purification circulating pump is arranged on the pipeline nine in a matching way.

2. The apparatus of claim 1, wherein the apparatus further comprises: and a check valve IV, a valve IV and a rotor flow meter IV are sequentially arranged on the water outlet pipe.

3. The apparatus of claim 1, wherein the apparatus further comprises: and the sewage discharge end of the preheater is communicated with a drain pipe.

4. The apparatus of claim 1, wherein the apparatus further comprises: and valves are arranged on the first pipeline, the third pipeline, the fourth pipeline, the sewage outlet pipe, the seventh pipeline and the ninth pipeline in a matching way.

5. The apparatus of claim 1, wherein the apparatus further comprises: the preheater is set as a heat exchanger, the negative pressure deamination tower is set as a stripping tower, the gas-liquid separation tank is set as a reflux tank, the ammonia pumping mixer is set as a water ejector, and the ammonia recovery device is set as an ammonia absorption tank.